TY - JOUR
T1 - Recycling of qubits
JF - Physica Scripta
Y1 - 2010
A1 - P Rapcan
A1 - Calsamiglia, John
A1 - MuĂ±oz-Tapia, Ramon
A1 - Bagan, Emilio
A1 - V Buzek
AB - We consider a finite number, N, of qubits that encode a pure single qubit state SU(2) covariantly. Given the N-qubit state has already been measured optimally to estimate the single-qubit state, we analyse the maximum information obtainable by a second, and subsequent observers ignorant of important details of the previous measurements. We quantify the information acquired by each observer as a function of N and of the number of independent observers that in succession have independently measured the same ensemble of qubits before him.
VL - T140
UR - http://iopscience.iop.org/1402-4896/2010/T140/014059?fromSearchPage=true
ER -